Buffing wheel



G. A. LYON BUFFING WHEEL Feb. 3, 1953 2 SHEETSSHEET 1 Filed Dec. 29, 1949 JiIVEIZL UP fieogeekfziberiyozz EL L55 G. A. LYON BUFFING WHEEL Feb. 3, 1953 Filed Dec. 29, 1949 2 SHEETS-SHEET 2 ZHVEJYL 0F Georgeofilioer Lyon Patented Feb. 3, 1953 UNITED STATES PATENT OFFICE BUFFING WHEEL George Albert Lyon, Detroit, Mich.

Application December 29, 1949, Serial No. 135,674

2 Claims. 1

This invention relates to an improved buff assembly for use on a buffing wheel. More particularly it has to do with a buff assembly which may be economically formed with a predetermined irregular peripheral contour by winding a continuous strip of buffing material on a core in such a manner that no score lines are formed on the surface of the article by the contact of the buff therewith.

This application is a continuation in part of my copending application U. S. Serial No. 126,353, filed November 9, 1949, which issued as Patent No. 2,571,147 on October 16, 1951.

When an article is being buffed by means of a buff assembly made up of a plurality of discs mounted side by side on a common arbor, there is a tendency for the buff to leave sectional lines on the surface of the article corresponding to the edges of the discs. These lines are, of course, objectionable on surfaces that require a highly polished finish.

According to the teachings of the present invention sectional lines are eliminated by a novel buff assembly that is fabricated in the following manner. terial of a constant width is wound on a generally cylindrical core or arbor with the plane of the flat strip substantially perpendicular to the axis of the core. The core, which has a predetermined peripheral contour, is provided with a helical groove in which the strip is disposed. The outer edge of the continuous strip will form a buifing surface comprising a helically wound contact area. As the buff rotates the slanted edges of the strip will tend to erase any lines that might be formed and thus a buffed surface results that is free of sectional lines.

It is, therefore, an important object of this invention to provide a buii assembly that will polish a surface without leaving section lines thereon.

Another object of this invention is to provide a bufi assembly that may be quickly and accurately assembled into a unit which may be readily installed on the spindle of a bufiing wheel.

Other and further features, objects and advantages of the present invention will be apparent to one skilled in the art from the following detailed description taken in connection with the accompanying drawings.

On the drawings:

Figure 1 is a side elevational view of a buff assembly constructed in accordance with the teaching of the present invention;

Figure 2 is an end elevational view of the buff assembly of Figure 1;

A relatively flat strip of bufiing ma- Figure 3 is a side elevational view of the buff assembly of the present invention with the surface of the core shown in elevation and the buffing element and the end of the core and the end plate shown in section;

Figure 4 is a fragmentary vertical sectional view taken on line IVIV of Figure 3;

Figure 5 is a fragmentary vertical sectional view taken on line VV of Figure 1; and

Figure 6 is a fragmentary vertical sectional view taken on line VI--VI of Figure 5.

As shown on the drawings:

In Figures 1, 2 and 3, the reference numeral [0 indicates 2. buff assembly which includes a core or arbor I2 having a central axially extending aperture I3. The core may be made of metal, plastic or any rigid material that may be formed by machining, molding or the like. This core may have an outer peripheral surface M. of a predetermined contour as best shown in Figure 3.

The core 12 has end portions l2a of reduced diameter over which rings l5 and I6 are disposed for securement to the core by capscrews l5a and [6a, respectively. The rings I5 and [5 each have greater diameters than the adjoining ends of the core l2 and thus flanges are provided at each end of the core.

The peripheral surface H! of the core [2 is provided with a helical groove 18 that winds from one end of the core to the other. A flat bufiing element 20, made of a plurality of sheets of material 23 of a constant width which are sewed together as at 26, after being bent over a flexible member 25, such as a wire or a cable and will, for convenience, be referred to as cable. The bufiing element is bent over the cable intermediate its ends and thus a round base portion 26 is formed which will lie in the groove I8 of the core. The groove [8 may have a rounded contour to snugly receive the base portion 26 to prevent axial displacement of the strip.

When the strip of buffing material 2!] is in place on the core l2, the outer edges will assume the contour of the periphery of the core as shown in Figure 3.

One end 25a of the cable 25 is anchored in a locking block 21 (Figure 5) which partially extends into a recess 28 in the core 12 and into a recess 29 in the end plate [5 adjacent an offset portion 15b. The end 25a of the cable is secured in the block 21 by peening or crimping a wedge block 38 thereon and then fitting the wedge block into a tapered hole 3| in the block 21.

To assemble the element 2!! on the core, the block 21 is first placed in the recesses 28 and 29 and then the element is wound in the groove l4. At the end of the groove, the end 256 of the cable 25 is inserted in a hole 32 in an offset portion I6b of the end plate [6. A U-bolt 33, disposed in a pair of slots 35 and 35a disposed in the plate I6 at right angles to said hole 32, has a bight portion 3'! extending around the cable end 251) and arranged to draw the cable into holding contact against the edges of the two holes 35 and 35a to prevent displacement of the cable 3| Nuts 36 are threaded on the end of the U-bolt as a means of clamping the cable by the U-bolt. The nuts 36 may be disposed in a recess 39 in the end flange l6 as seen in Figure 4.

It is to be noted that the offset portions I5?) and l6b of the end plates I5 and I 6 are substantially equal to the width of the groove which is, of course, equal to the width of the buffing element. Thus, if the core I2 were provided without a helical groove, a buffing element started at 15b and wound toward l 65 would assume a helical pattern.

Thus, there is provided in this invention a simple buff assembly in which the buffing surface is formed by a plurality of helical contact sur faces which substantially eliminate sectional score marks on the finished article.

It will be understood that modifications and variations may be effected without departing from the scope of the novel concepts of the present invention.

I claim as my invention:

1. In a wheel structure, a core, a continuous cable wound under tension on said core, surface treating material projecting radially from said cable and wound with said cable tightly on said core, said core having a recess therein adjacent one end thereof, a block disposed in said recess, means for securing one end portion of said cable to said block, said block extending under at least the first convolution of said cable and being locked in said recess by said cable, and means for securing the other end of said cable to said core.

2. In a wheel structure for treating an irregular surface of the character described, a

rotary core circular in cross-section but of irregular sinuous peripheral surface substantially complementary in longitudinal cross-section to the profile of an object to be surface treated, a cable wound continuously tightly on said surface and having treating material of substantially uniform width throughout the length of the cable projecting radially therefrom and wound tightly with said cable on said irregular surface of the core, means defining a pair of end flanges projecting radially outwardly at either end of said core, means securing the starting end portion of said cable to said core adjacent one of said end flanges, and a U-bolt extending through the other of said flanges for adjustably clamping the other end portion of said cable between the inside of the bight portion of said U-bolt and said other of said flanges with said cable and said material wound tightly on said surface, with the first convolution from said other end of said cable engaging the outside of the bight portion of said U-bolt and locking said U-bolt and said other end of said cable in position and with the periphery defined by the treated material substantially conforming to said irregular surface of the core.

GEORGE ALBERT LYON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 15,226 Levett Nov. 15, 1921 230,768 Gingras Aug. 3, 1880 533,833 Webster Feb. 5, 1895 1,761,890 Ludorf June 3, 1930 2,267,584 Cave et al Dec. 23, 1941 2,424,873 Abbrecht July 29, 1947 2,468,686 Sax Apr. 26, 1949 FOREIGN PATENTS Number Country Date 289,325 France May 29, 1899 550,823 France Dec. 21, 1922 

